AS & A Level Chemistry (9701) — May–June 2024, Paper 13
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →X is an impure sample of a Group 2 metal carbonate, MCO3. X contains 57% by mass of MCO3. The impurities in X do not react with hydrochloric acid. 7.4 g of X is reacted with an…
Answer this question and get it marked →Which of these samples of gas contains the same number of atoms as 1 g of hydrogen gas? A 22 g of carbon dioxide (Mr: CO2, 44) B 8 g of methane (Mr: CH4, 16) C 20 g of neon (Mr:…
Answer this question and get it marked →What is the total number of protons, neutrons and electrons present in an ammonium ion with a relative formula mass of 21? number of protons number of neutrons number of electrons…
Answer this question and get it marked →This question is about the first ionisation energies of magnesium and neon. Which row is correct? first ionisation energy type of electron removed from Mg type of electron removed…
Answer this question and get it marked →Arsenic forms a compound with fluorine. In this compound, the arsenic atom has no lone pair of electrons and there are no dative bonds. Selenium also forms a compound with…
Answer this question and get it marked →A structure for borazole, N3B3H6, is shown: a planar six-membered ring of alternating boron and nitrogen atoms, each carrying one H atom, with one B=N double bond drawn and the…
Answer this question and get it marked →The diagram shows the apparatus used to find the relative molecular mass of a volatile liquid: a gas syringe heated in an enclosure, with a thermometer and a heater, into which…
Answer this question and get it marked →The table shows physical properties of four substances, W, X, Y and Z. melting point /degC boiling point /degC electrical conductivity of solid electrical conductivity of liquid…
Answer this question and get it marked →The apparatus used to determine a value for the enthalpy of combustion of butan-1-ol is shown: a copper can holding 175 cm^3 of water with a thermometer, heated by a burner…
Answer this question and get it marked →In the high temperatures of car engines, nitrogen reacts with oxygen to produce nitrogen monoxide. 1/2 N2(g) + 1/2 O2(g) - NO(g) deltaH(standard) = +90 kJ mol^-1 This reaction has…
Answer this question and get it marked →In which reaction does the oxidation number of chlorine change by the largest amount? A 2KClO3 - 2KCl + 3O2 B 2ClO^- - Cl^- + ClO2^- C Cl2 + H2O - HCl + HClO D 2NaClO2 + Cl2 -…
Answer this question and get it marked →Hydrogen is produced industrially from methane as shown in the equation. CH4(g) + H2O(g) <= CO(g) + 3H2(g) deltaH(standard) = +205 kJ mol^-1 Which conditions give the highest…
Answer this question and get it marked →W moles of HNO2 undergoes a disproportionation reaction to produce U moles of HNO3 and V moles of NO. - No other nitrogen containing product is produced. - Nitrogen is the only…
Answer this question and get it marked →Gas X dissociates on heating to set up the following equilibrium. X(g) <= Y(g) + Z(g) A quantity of gas X is heated at constant pressure, p, at a certain temperature. The…
Answer this question and get it marked →In the diagram, X is the Boltzmann distribution for the energies of the particles in a reaction and Ea1 is the activation energy for that reaction. Three Boltzmann distribution…
Answer this question and get it marked →Magnesium, aluminium and silicon are elements in the Periodic Table. Each element forms an oxide. Which row is correct? MgO Al2O3 SiO2 --- --- --- --- A basic amphoteric…
Answer this question and get it marked →Which statement correctly describes what happens when silicon tetrachloride is added to water? A The SiCl4 dissolves to give a neutral solution only. B The SiCl4 reacts to give an…
Answer this question and get it marked →X and Y are two elements from Period 3 of the Periodic Table. Element X has a higher electrical conductivity than element Y. Element Y has a higher melting point than element X.…
Answer this question and get it marked →A sample consisting of 1.0 mol of anhydrous calcium nitrate is completely decomposed by strong heating. What is the total amount of gas produced in this reaction? A 1.0 mol B 2.0…
Answer this question and get it marked →Steam is passed over heated magnesium to give compound J and hydrogen. What is not a property of compound J? A It has an Mr of 40.3. B It is basic. C It is a white solid. D It is…
Answer this question and get it marked →Which statement is correct? A Hydrogen bromide reduces concentrated sulfuric acid to form sulfur dioxide gas. B Hydrogen bromide decomposes at a higher temperature than hydrogen…
Answer this question and get it marked →ICl is made when Cl2 and I2 react together. Cl2 + I2 <= 2ICl ICl reacts with water. 5ICl + 3H2O - 5HCl + HIO3 + 2I2 Which row is correct? oxidation number of I in ICl reaction…
Answer this question and get it marked →NH4Cl reacts with NaOH in an aqueous solution. Which statement is correct? A The reaction gives rise to two different polar product molecules. B The bond angle in the…
Answer this question and get it marked →What is produced when 60 g of nitrogen monoxide reacts with an excess of carbon monoxide in a catalytic converter? A 12 g of carbon and 92 g of nitrogen dioxide B 24 g of carbon…
Answer this question and get it marked →Which alkene shows geometric isomerism? A CH3CH2CH2CH=CH2 B CH3CH2CH=CHCH3 C CH3CH2C(CH3)=CH2 D CH3CH=C(CH3)CH3
Answer this question and get it marked →What is the correct name of the major product of the reaction of HBr with 3-ethylhex-3-ene? A 3-bromo-3-ethylhexane B 3-bromo-4-ethylhexane C 4-bromo-3-ethylhexane D…
Answer this question and get it marked →The alkane CH3CH2CH(CH3)2 undergoes free radical substitution with chlorine. No C-C bonds are broken in this reaction. How many isomeric products, including positional and optical…
Answer this question and get it marked →What is involved in the mechanism of the reaction between aqueous NaOH and 1-bromobutane? A attack by a nucleophile on a carbon atom with a partial positive charge B heterolytic…
Answer this question and get it marked →But-2-ene reacts with cold dilute acidified KMnO4 to give product X. But-2-ene reacts with an excess of hot concentrated acidified KMnO4 to give product Y. Which statement about X…
Answer this question and get it marked →When heated with KOH dissolved in ethanol, halogenoalkanes can undergo an elimination reaction to form alkenes. What are the possible elimination products when 2-bromobutane is…
Answer this question and get it marked →Chloroethane can be used to make sodium propanoate. chloroethane - intermediate Q - sodium propanoate Intermediate Q is hydrolysed with boiling aqueous NaOH to give sodium…
Answer this question and get it marked →Four different alcohols are treated with alkaline I2(aq). Which row is correct? name of alcohol formulae of products --- --- --- A butan-2-ol CH3COO^- and CH3CI3 B propan-1-ol…
Answer this question and get it marked →The Mr of compound X is 88. Compound X is heated under reflux with an excess of acidified potassium dichromate(VI) to produce compound Y. Compound Y reacts with compound X under…
Answer this question and get it marked →Butanedione, CH3COCOCH3, is a yellow liquid. How does butanedione react with 2,4-dinitrophenylhydrazine reagent and Fehling's reagent? 2,4-dinitrophenylhydrazine Fehling's --- ---…
Answer this question and get it marked →Which substance reacts with ethanoic acid to give the organic product with the highest Mr? A lithium aluminium hydride B magnesium C potassium carbonate D propan-2-ol
Answer this question and get it marked →A sample of propyl ethanoate is hydrolysed by heating under reflux with aqueous NaOH. The two organic products of the hydrolysis are separated, purified and weighed. Out of the…
Answer this question and get it marked →Which statement about PVC is correct? A Combustion products of PVC are very alkaline and harmful to breathe in. B The empirical formula of PVC is the same as the empirical formula…
Answer this question and get it marked →Compound Q reacts separately with HCN and NaBH4 under suitable conditions. Both reactions produce an organic product with a chiral centre. What is compound Q? A butanone B ethanal…
Answer this question and get it marked →Compound X has the following properties. - When 0.20 mol of X undergoes complete combustion, 14.4 dm^3 of carbon dioxide is produced, measured under room conditions. - X reacts…
Answer this question and get it marked →A sample of but-2-enoic acid, CH3CH=CHCOOH, is analysed using infrared spectroscopy. The infrared spectrum shows a broad peak in the range 2500-3000 cm^-1. A table of…
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